66 



DISCUSSION OF THE INFLUENCE OF THE MOON 



Before we combine the above results of years and parts of years, it is desirable 

 to inquire into the variability of the lunar effect in summer and winter. Consider- 

 ing the months from April to September (inclusive) as summer months, and those 

 from October to March (inclusive) as winter months, and combining the differences 

 from the monthly normals in each year according to the number of observations, 

 we obtain the following results : 



These numbers are sufficiently irregular to indicate that we cannot hope to 

 deduce any separate results for the seasons, the number of observations (about 

 9800) being altogether insufficient. We can therefore in our general combination 



